Speculum



(N0 Model.) Y

H. EHRHARDT.

SPEGULUM. No. 307,930. Patented Nov. 11, 1884 WITNESSES ZlNVENTOR.

N, PETERS. Phom-Ulhngrapher, Wanhingian. a, c

I llNrTnn STATES HENRY EHBHARDT, OF BEARDSTOIVN, ILLINOIS.

SPECULUM.

EEFECIFIOATION forming part of Letters Patent No. 307,930, dated November 11, 188%.

' Application filed July 7, 1884. No model.)

To all whom it may concern Be it known that I, HENRY EHRIIARDT, a citizen of the United States, and a resident of Bea-rdstown, in the county of Cass and State of Illinois, have invented certain new and useful Improvements in Speeulums; and .-I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specificar tion, and in which Figure l is a perspective view of my improved speculum. Fig. 2 is a plan view of the same. Fig. 3 is a longitudinal vertical sectional view. Fig. 4 is a horizontal sectionalview, and Fig. 5 is a perspective View illustrating the operation of the device.

The same letters refer to the same parts in all the figures.

This invention relates to speculums for the purpose of examining the mouth and throat in cases of diseases of the latter; and it has for its object to provide a device of simple construction, which shall serve for the several purposes of keeping the jaws of the patient open or apart during the examination, to depress the tongue, and to reflect the light in.

such a manner as to enable the physician to examine the posterior portions of the mouth and throat.

To this end the invention consists in the P improved.construction of the said speculum, which will be hereinafter fully described, and pointed out in the claims.

In the drawings, A designates an ovallyshaped tube the front end of which is pro vided with a curved flange, B. The upper part of the said tube is cut away, as shown at O, for the purpose of facilitating the insertion of the speculum into the mouth of the patient and avoiding any danger of injury to the roof of the mouth. The lower portion of thetube is provided with a rearwardly-extending lip, D, serving for the purpose of keeping the tongue depressed, so as to expose the rear portion of the mouth and throat clearly to view. The said lip D is slightly bent in a downward direction, and it is provided along its entire circumference with a slightly-up turned flange, E. The upper and lower sides of the tube A are provided with slightlyraised flanges F F, which, when encircled beed to receive any kind of a pointed instru- 6o ment, by means of which the speculum may be easily removed in the event of any difficulty whatever being experienced in its removal after the examination has been completed.

The advantages of this invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed.

The construction of the device is exceedingly simple, and the device is one which will enable examinations of the mouth and throat to be made in a more complete and satisfactory manner than by the methods ordinarily resorted to.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States 1. In a speculum of the class described, the combination, with the ovally-shaped tube hav-- ing a rearwardly-extending lip at its lower edge, of flanges secured to or formed upon the upper and lower sides of the said tube near the front end of the latter, substantially as set forth.

2. As an improvement in speculums for the examination of the mouth and throat, an ovally-shaped tube having a curved flange at its front end, having its rear upper portion cut away, and provided at its lower edge with a rearwardly-extending lip, substantially as and for the purpose set forth.

3. As an improvement in speculurns for the examination of the month and throat, an ovally-constructed tube having a curved flange at its front end, slots or notches in its sides near the front end, suitable flanges formed upon its upper and lower sides, anda lip extending rearwardly from its lower edge, the upper rear portion of the said tube being cut away, substantially as herein shown and described, for Ioo the purpose set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

HENRY EHRHABDT.

Vi tnesses:

XV. H. McCormick, R. H. DUNN. 

